Deep-sea mining has been proposed as a source of crucial metals and minerals for decades – and mining companies now say the technology is almost ready to make this a reality. Subscribe to The Guardian on YouTube ► http://bit.ly/subscribegdn Already this week, the Trump administration is reportedly considering an executive order that would enable the stockpiling of metals mined from the bottom of the Pacific Ocean – in an effort to counter China’s dominance of battery minerals and rare-earth